Coverage breaks sourcemaps

Issue :

If user enables test coverage with Jest then the sourcemaps are not correct.

Expected behavior :

Lines should be shown correctly, even if developer enables coverage report with Jest.

Minimal repo :

Github project: https://github.com/maxpolski/ts-react-jest/ Please kindly note that this is NOT my repository Run jest with coverage option. You will notice that the sourcemaps are not working correctly. To make sure, you can add console.log() in any React component and compare the line where console.log occured with the one displayed in the jest output. Interestingly, sourcemaps work absolutely fine in test files, but not in source files.

[antonovicha]

Was fixed in 23.1.2, see . But reproducible in: jest 24.9.0 + ts-jest 24.0.2 jest 23.6.0 + ts-jest 23.10.5 (latest 23.* versions as of today)

Workaround for debugging:

• remove collectCoverage from config
• add --coverage to jest cli in test script of package.json:

"test": "jest --config ./jestConfig.json --coverage"

[dgreene1]

I confirmed that this was the cause of my inability to debug tests via vscode-jest. Turning off code coverage allowed the sourcemaps to be built properly.